"For all three children, they have taken one of the most tragic things that anyone could ever face and turned it into something to bring about improvements so that people are safer in general, that's a wonderful tribute to their mother Zahra," he said.

Atena Abrahimzadeh says she hopes other women can be spared her mother's fate by changes to policy and policing.

"I hope that what happened to mum and our family doesn't happen to other vulnerable women out there," she said.